While Mandatory Access Controls (MAC) are appropriate for multilevel secure military applications, Discretionary Access Controls (DAC) are often perceived as meeting the security processing needs of industry and civilian government. This paper argues that reliance on DAC as the principal method

Based on the OpenFlow model, we propose an access control scheme for SDN controllers. Our scheme accounts for the different network resources, multiple security requirements, conflicts originating from the reconfiguration of network com-ponents, and the delegation of access permissions.

is accessed through a text interface and is designed to interoperate with any standard SDN controller platform. We demonstrate the capabilities of OFf through three test scenarios that illustrate its utility and modest performance impact on running applications. Specifically, we show how OFf can be used

Fuzz testing is an effective technique for finding security vulnerabilities in software. Traditionally, fuzz testing tools apply random mutations to well-formed inputs of a program and test the resulting values. We present an alternative whitebox fuzz testing approach inspired by recent advances

, addresses) and user machines must be bound tightly to the unambiguously defined network appliances and its ports. Using traditional network architecture these solutions are difficult to realize. The SDN framework allows to solve these problems more sharply and securely. The AAA design based on the Software

level and dynamic access control prevents release of high information to low callers. Programs fitting this pattern would be rejected by previous flow analyses. We give a static analysis that admits them, using permission-dependent security types. The analysis is given for a class-based object

Despite the best efforts of security researchers, sometimes the static nature of authorisation can cause unexpected risks for users working in a dynamically changing environment. Disasters, medical emergencies or time-critical events can all lead to situations where the ability to relax normal

, it may reduce the control that an organization has over its resources, thereby diminishing a major advantage RBAC has over Discretionary Access Control (DAC). We propose to use security analysis techniques to maintain desirable security properties while delegating administrative privileges. We give a

therefore it is the most restrictive access control method. It is useful in a highly secured environment. For example military, research centers. In Discretionary access control model, the end users have complete authority to assign any rights to objects. But

of users, and the dependence between physical and virtual aspects of security in Active Spaces. Our model provides support for both discretionary and mandatory access control policies, and uses role-based access control techniques for easy administration of users and permissions. We dynamically assign